Journal
CHEMCATCHEM
Volume 8, Issue 17, Pages 2838-2845Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.201600397
Keywords
antibiotics; energy conversion; hydrogen bonds; nitrides; photochemistry
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Funding
- Natural Science Foundation of China [21471040, 21271055, 21501035]
- China Postdoctoral Science Foundation [2015M570298]
- Fundamental Research Funds for the Central Universities [HIT.IBRSEM. A.201410]
- Program for Innovation Research of Science in Harbin Institute of Technology (PIRS of HIT) [B201508]
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Two-dimensional nanosheets have attracted attention because of their fascinating properties in areas such as photocatalysis, sensors, and energy storage. Herein, a facile hydrogen-bond-assisted approach was designed to prepare graphitic carbon nitride (g-C3N4) with large-scale ultrathin nanosheets. Compared with previous methods, this method is simple, economical, and eco-friendly. The as-prepared ultrathin g-C3N4 nanosheets have a few-layer thickness of 2-3 nm and exhibit a significantly enhanced photocatalytic activity in both H-2 production and ciprofloxacin degradation under visible light compared to pristine g-C3N4. The enhanced photocatalytic activity is attributed to the minimal sheet thickness, high surface area, increased band gap, outstanding electron transport ability, and long charge-carrier lifetime. In addition, the possible formation mechanism, transfer and separation behavior of the charge carriers, and the photocatalytic mechanism are discussed. This work presents a new hydrogen-bond-assisted self-assembly strategy for the preparation of ultrathin g-C3N4 nanosheets for application in photocatalysis.
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